Patent US2298961A successfully refreshed from Google Patents.
US2770799A
Expired / Lapsed
US
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Emergency diaphragm for air brakes and the like
Assignee: Individual
•
Filing: 1953-07-24
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Granted: 1956-11-13
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Expires: 1973-07-24
Abstract
No abstract record available.
Inventors
- 👤 Charles H Horn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:31
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/08; Y; Y10; Y10T; Y10T137/00; Y10T137/5762
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US337116A
Cited
US1022865A
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US1385058A
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US1528074A
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US1962168A
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US2323950A
Cited
US2495081A
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US2691773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |